All depending on what you do in life and career wise,
you should be able to choose your classes based on what you plan on and want to do.
I feel like we don't use any of what we learn in school outside of school,
besides reading and basic math skills.
your mind use subconscious all this you know for this reason 2 people react different in the same situation
Besides basic stuff, nothing can be used outside school.
Calculus is one of the example.
Differentiation and integration have no use outside school, except you're an engineer.
Especially in Hong Kong, we have to learn ancient Chinese!! <---- what the h*ll